8 0 0 0 1 2 6 0 0
0 0 0 0 0 3 7 0 0
0 0 0 0 0 0 5 0 8
3 0 0 0 8 0 9 0 1
0 7 0 0 0 0 0 4 0
1 0 2 0 9 0 0 0 7
4 0 8 0 0 0 0 0 0
0 0 7 9 0 0 0 0 0
0 0 9 1 7 0 0 0 3